Port 25 for single sender

Hello, I have a monitoring service on my home automation system that only accepts connecting to smtp port 25 for sending email.

Is there a way to open this port just for the single IP address where the monitoring service is running?


Paulo Matos

It’s possible, however any configuration files you change to make this work will be rewrote once you next upgrade mail-in-a-box. I wouldn’t advise adjusting anything.